I blogged a little while ago around to support integration tests using Autofac. This was specific to Autofac but documented a workaround for a long standing issue with ConfigureTestContainer that was introduced into .NET core 3.0 which affects all third-party containers that use ConfigureTestContainer in their tests.
Updated 2nd Oct 2020: for an approach that works with Autofac 6 and ConfigureTestContainer see this post.
I've written before about how unit testing Entity Framework is a contentious and sometimes pointless activity. The TL;DR is that LINQ-to-Objects != Linq-to-Entities and so if you want some useful tests around your data tier then integration tests that actually hit a database are what you want.